Transfer arm



Nov. 5, 1940. J R. GREER 2,220,097

TRANSFER ARM Original Filed April 22, 1938 Fly] - nyz Patented Nov. 5,1940 PATENT OFFICE TRANSFER ARM Agnes J. Reeves Greer, Morgantown, W.Va.

Original application April 22, 1938, Serial No.

2 Claims.

The invention relates to transfer arms for use in apparatus for picklingcoils of metal, of the general type of machines disclosed in my priorPatent No. 2,091.921, issued August 31, 1937, and

the present application is a division of my oopending application forPickling machines, Serial No. 203,507, filed April 22, 1938.

Machines of the general type referred to provide for the pickling ofcoils of metal supported upon mandrels which are progressed throughpickling and washing tanks, and the present invention relates totransfer arms for transferring the mandrels with the coils thereon fromone tank to the next succeeding tank or for removing the mandrel andcoil from the last tank.

The object of the improvement is to provide arcuate surfaces upon thetransfer arms in order to retard the movement of the mandrel across thetransfer arms as the arms are operated.

A further object is to provide arcuate transfer arms with toothed tracksfor engagement with sprockets or gears upon the mandrels.

The above objects together with others which will be apparent from thedrawing and following description, or which may be later referred to,may be attained by constructing the improved transfer arms in the mannerillustrated in the accompanying drawing in which- Figure 1 is afragmentary top plan view of the adjacent ends of two adjoining tanks ofa pickling machine showing'the improved transfer arms for removing themandrel and coil from one tank and charging them into the adjacent tank;

Fig. 2, a side elevation of the parts shown in Fig. 1;

Fig. 3, an enlarged fragmentary elevation partly in section of one ofthe transfer arms showing the curved toothed track thereon; and

Fig. 4, a further enlarged transverse sectional view taken as on theline 44, Fig. 3.

Similar numerals refer to similar parts throughout the several views.

The discharge end portion of a pickling tank is indicated generally atl0, and the charging end portion of the first washing tank is indicatedat H.

Rails l2 may be mounted above the pickling tank l0 forming a track uponwhich the mandrels may be rotated as they are progressed forwardly alongthe tank so that the coils suspended thereon may be rotated through theacid in the tank as disclosed in my prior application above referred to.

The mandrel is in the form of a shaft l3 having a roller l4 fixed neareach end thereof and Divided and this application March 13, 1939, SerialNo. 261,493

adapted to travel upon the'corresponding rail 12.

A sprocket wheel or gear l5 may be fixed upon each end portion of themandrel shaft l3 and is adapted to travel upon the toothedtrack asdisclosed in my co-pending application Serial No. 5 203,507 of whichthis is a division.

Each sprocket wheel i5 is adapted to be engaged by an endless drivechain l6 located over sprockets ii at opposite ends of the pickling tankand adapted to be continuously driven in unison by means of the gearingindicated at 18 and the motor 19, drives the chains in the direction ofthe arrows shown in the drawing, the mandrel shaft being rotated andprogressed forwardly along the rails. 1

Near the discharge end of the pickling tank the rails I2 are preferablyinclined downwardly as at 20 so that as the sprockets ii of the mandrelbecome disengaged from the drive chains I6 the mandrel rolls down thisincline and is deposited 0 in the hooks 2| of the transfer arms 22.These transfer arms are fixed in spaced relation upon a rocker shaft 23arranged to be connected through suitable gearing indicated generally at24 to a motor or other driving means 25.

The track portion 26 of each of the transfer arm hooks, which receivesthe ends of the mandrel shaft, and the toothed track portion 21 of eachhook which engages the sprocket wheels I! of the mandrel, are bothconcaved as best shown in Fig. 3 so as to retard the movement of themandrel as it rolls down the tracks of the books when the arms are movedover center and toward the-discharge position.

The toothed track 21 may be in the form of a section of sprocket chain,as indicated in Eigs. 3 and 4 located in a channel member 28 co ected atits ends to the hook 2| as by the bol 9 and having a spaced pair offlanges 30 formed upon or fixed thereto, between which is located thesprocket chain 21, the pins 3| of which may be located through theflanges 30.

In the operation of the apparatus the mandrel IS with the coil Csuspended thereon when received in the hooks of the transfer arms ismoved from the ends of the rails l2 and deposited in the curved guides32 at the charging end of the first washing tank ll, riding down intothe position shown in Fig. 2, where the mandrel shaft engages therailsa'S similar to the rails l2 above described and sprocket wheels ofthe mandrel shaft engage the drive chain 34 driven over sprocket wheels35 in the direction of the arrow shown in Fig. 2 to convey the mandrelswith the coils thereon through the first washing tank.

Although the transfer arms are shown only as located between thepickling tank and the first washing tank it should be understood thatthe same transfer arms are applicable for use he- 5 tween the first andsecond washing tanks or for removing the mandrels and coils suspendedthereon from the second washing tank.

I claim: 1. Apparatus for handling a coil of metal in- 10 eluding amandrel upon which the coil is supported, and substantially T-shapedtransfers arms pivoted at their inner ends and each having a hook at itsouter end provided with a stop at each side and a concaved track portionextending en- AGNES J. REEvEs GREER.

